An opportunity has arisen for an experienced Snr Process Design Engineer at Sellafield with experience of small scale in pond abatement deployment and local silt/ swarf removal and Design Justification to join the TDA Project Design Team. You should be a British Citizen and passport holder and not have worked outside the UK during the past 5 years. Candidates can start with BPSS security clearance whilst higher level clearance is being undertaken. This is a full time contract position inside IR35 with a requirement to spend a minimum of 3 days per week in the Whitehaven offices or Sellafield Site when required. This is an exciting opportunity to become part of an established team working on an emerging project at Sellafield. This role offers the chance to work in a dynamic and forward-thinking environment to deliver a project of national importance. The successful candidate will work closely with the Project Engineering Manager, multi-disciplinary project teams, and the Client on a fast-paced project. ROLE RESPONSIBILITIES Provide Lessons from Experience (LFE) and apply knowledge of plant constraints throughout the project delivery process. Review and approve Technical Queries (TQs) to enable site works to progress safely and efficiently. Produce NFR and feasibility documentation to justify design decisions and undertake Design Justification Reports for submission to MSC. Check and approve Process discipline plans, drawings, and quantities to ensure technical accuracy and compliance. Manage and control design documentation (drawings and specifications) for the Process discipline. Maintain configuration control of engineering deliverables and associated site works. Liaise with designers and other stakeholders to ensure compliance with design and construction regulations. Provide regular progress reports and updates to the Project Engineering Manager (PEM). Plan and prioritise work effectively, adapting to setbacks and resolving technical challenges as they arise. Contribute site-based knowledge and technical input to Design and Constructability Reviews. ESSENTIAL EXPERIENCE & QUALIFICATIONS Hold an HNC/HND in Mechanical Engineering (or equivalent qualification). Demonstrate strong plant knowledge and experience working within an operational environment. Have working experience using CIMAGE on the SL System. A positive can-do attitude, excellent communication and collaboration skills with the ability to work effectively across diverse project teams. Must hold appropriate Security Clearance (SC and British Sole National) and be a Sellafield pass holder.